English
heterosteric
From hetero- + steric.
Proto-Indo-European *sem- ‘one, whole’
Proto-Indo-European *sḿ̥teros
Proto-Hellenic *hə́teros
Ancient Greek ἕτερος ‘other, another, different’
English hetero-
Today it means
adj Not sterically equivalent
Language periods are conventional ranges, not dates for this word.
Etymograph / heterosteric